package fr.sedoo.commons.metadata.utils.xml;

import net.jcip.annotations.Immutable;

import org.geotoolkit.util.Strings;
import org.geotoolkit.xml.Namespaces;
import com.sun.xml.bind.marshaller.NamespacePrefixMapper;


@Immutable
final class RBVNamespacePrefixMapper_Endorsed extends NamespacePrefixMapper {
    /**
     * If set, this namespace will be the root of the document with no prefix.
     */
    private final String rootNamespace;

    /**
     * The default prefix to return when no namespace is given.
     */
    private final String defaultPrefix;

    /**
     * Builds a mapper of prefixes.
     *
     * @param rootNamespace The root namespace.
     */
    public RBVNamespacePrefixMapper_Endorsed(final String rootNamespace) {
        this.rootNamespace = rootNamespace;
        defaultPrefix = rootNamespace.substring(rootNamespace.lastIndexOf('/') + 1);
    }

    /**
     * Returns a preferred prefix for the given namespace URI.
     *
     * @param  namespace  The namespace URI for which the prefix needs to be found.
     * @param  suggestion The suggested prefix, returned if the given namespace is not recognized.
     * @param  required   Ignored in this implementation.
     * @return The prefix inferred from the namespace URI.
     */
    @Override
    public String getPreferredPrefix(String namespace, final String suggestion, final boolean required) {
    	if (namespace == null || namespace.isEmpty()) {
            return defaultPrefix;
        }
        /*
         * If the current namespace is the one defined as root namespace, this implementation
         * just returns an empty string. This namespace will be defined with a xmlns parameter,
         * and all tags in this namespace will not have any namespace prefix.
         */
        if (namespace.equals(rootNamespace)) {
            return "";
        }
        if (namespace.equals(RBVNamespaces.RBV_NAMESPACE))
        {
        	return RBVNamespaces.RBV_PREFIX;
        }
        if (namespace.equals(RBVNamespaces.GMD_NAMESPACE))
        {
        	return RBVNamespaces.GMD_PREFIX;
        }
        
        return Namespaces.getPreferredPrefix(namespace, suggestion);
    }

    /**
     * Returns a list of namespace URIs that should be declared at the root element.
     * This implementation returns an empty list.
     *
     * @return Namespace URIs that should be declared at the root element.
     */
    @Override
    public String[] getPreDeclaredNamespaceUris() {
        return Strings.EMPTY;
    }
}

